Hi Thanks for your response
1) I am hosting the site on 'godaddy' server
2) I have installed 'W3 Total Cache' but its not working as I get below error message 'FTP credentials don't allow to write to file /home/surehrehman/embsenindia.org/.htaccess' . Will try to fix it
3) My hosting in godaddy is currntly hosting about 10 websites. Is that a big number ?